MeterTo
MeterTo mainly offers instruments and tools.
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Specification
Model: UT523A
Earth resistance
0.00Ω～19.99Ω ±(2%+5)
20.0Ω～199.9Ω ±(2%+5)
200Ω～1999Ω ±(2%+5)
2.00kΩ～19.99kΩ ±(2%+5)
20.0kΩ～210.0kΩ ±(2%+5)

Soil resistivity （Decided by measuring precision of R: (ρ=2πaR a:1 m～100m, π=3.141)）
0.00Ωm～99.99Ωm
100.0Ωm～999.9Ωm
1000Ωm～9999Ωm
10.00kΩm～99.99kΩm
100.0kΩm～999.9kΩm
1000kΩm～9000kΩm

Earth voltage AC 0.00～750V ±(2%+5)
Testing resistance 128Hz/111Hz/105Hz/94Hz(AFC)

Features
Measuring method Earth resistance: rated current pole changing method with Max 20mA measuring current;
soil resistivity: quadrupole method (Wen-Na method );
earth voltage: average rectifier (between P(S) and ES interfaces)
Short-circuit testing current AC 30mA max
Open-circuit testing voltage AC 40V max
Distance between electrodes 1m～200m can be set.
Testing voltage waveform Sine wave
Line voltage Measure when the voltage is below 750V AC
Low battery indicator ≤7.5V
Auxiliary earth resistance test 0.00KΩ～30kΩ(100R+rCOverload protection Earth resistance measurement: input 280V AC between C(H) and E, P(S) and ES for 3s
Interference test Auto identify interference signals, when interference voltage is higher than 5V, the symbole NOISE is displayed.
Measuring time(s) More than 5000 times (perform short circuit test once, and again after 30s)
Insulation resistance Above 20MΩ (500V between circuit and case)
Power supply DC 9V (6 Zinc-manganese dry batteries, R14S 1.5V; can continuously standby for 300hrs)
Standard accessories Standard test lead, simple test lead, batteries, PC software CD, RS232 interface cable